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(11)

EP 3 223 956 A1

(12)

(43) Date of publication: 04.10.2017 Bulletin 2017/40 (21) Application number: 15798444.4 (22) Date of filing: 24.11.2015

(51) International Patent Classification (IPC):  B03D 1/08(2006.01) B02C 17/16(2006.01) B03D 1/14(2006.01) B02C 23/30(2006.01) (86) International application number: PCT/EP2015/077465 (87) International publication number: WO 2016/083353 (02.06.2016 Gazette 2016/22)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 28.11.2014 EP 14195365 03.02.2015 US 201562111145 P (71) Applicant: Omya International AG 4665 Oftringen (CH)	(72) Inventors: STEINWENDER, Michael A-9020 Klagenfurt (AT) SÖTEMANN, Jörg 79618 Rheinfelden (DE) (74) Representative: Chwalka, Bettina  Maiwald Patentanwalts GmbH Elisenhof Elisenstraße 3 80335 München 80335 München (DE)